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Genus Piptadenia
- tropical American trees and shrubs; often placed in other genera
Genus Pithecellobium
- thorny shrubs and trees of tropical and subtropical America and Asia
Genus Pithecolobium
- thorny shrubs and trees of tropical and subtropical America and Asia
Genus Prosopis
- genus of tropical or subtropical branching shrubs or trees: mesquite
Genus Apocynum
- perennial herbs with small pink or white flowers
Genus Acocanthera
- small genus of trees and shrubs containing strongly toxic cardiac glycosides; Arabia to Africa
Genus Acokanthera
- small genus of trees and shrubs containing strongly toxic cardiac glycosides; Arabia to Africa
Genus Adenium
- one species: succulent shrub or tree of tropical Africa and Arabia
Genus Allamanda
- genus of tropical American woody vines
Genus Alstonia
- genus of evergreen trees or shrubs with white funnel-shaped flowers and milky sap; tropical Africa to southeastern Asia and Polynesia